I've noticed the Therian forms of Thundurus, Tornadus and Landorus are very scary for the most part. So I decided to make a team around them. Yay! As for the Zulu part, I just picked a language off of Google Translate and full credit for the idea goes to here.

Thundurus, with its base 101 speed, basically outspeeds anything with its Choice Scarf. Volt Switch for a pseudo-Genesect type move and STAB, Focus Blast is for coverage, HP Ice is for Ground Types who predict the Volt Switch, and Thunderbolt is for some nice STAB. Volt Absorb helps cover for Tornadus quite nicely, as it heals off of its weakness.

Intimidate is amazing, and this common Lando-T set proves to have perfect synergy with the rest of the Therian forms. Earthquake is beautiful STAB, Superpower covers Jellicent's dark weakness and provides great damage, Stone Edge is for coverage, and U-Turn forms a nice core with Volt Switch as an annoyance. It is also nice for outpredicts and still doing damage.

Tornadus-T has more Speed than its Incarnate counterpart, meaning it can hit hard and fast with a Life Orb without worrying about being outsped by too much. U-Turn is for switching out into Thundurus if an Electric Move comes or Landorus if a Rock Move comes. Heat Wave and Dark Pulse are various coverage moves, and Hurricane provides amazing STAB. Regenerator is its Life Orb recovery with U-Turn, not only switching out but also dealing damage and healing.

Jellicent, though UU, provides great synergy with Landorus with its own Water Absorb and also makes a nice Special Wall that can stall as well. All of its weaknesses are covered by the Therians, and it covers Landorus' 4x Ice weakness. Scald is for damage (and burnhax), Recover is for healing, and Protect is for... protection. o3o. I'm not entirely sure as whether to take Toxic or Confuse Ray, but both serve a purpose quite nicely.

Skarmory provides resistance to rocks (which wrecks this team) while clearing them out with Defog. Spikes provide hazard damage to compile on the opposing team, Roost provides recovery and Iron Head makes it have some damage and not become bait for Taunt.

I thought Mega Venusaur would be a great fit for this team, as it stitches the fabric of the team that removes most of its weaknesses. Giga Drain for recovery and STAB, Synthesis for even more recovery, Sleep Powder for sleepy times for sweepers like Bisharp and other annoyances, and Roar to switch out the annoyances and make them take damage from rocks.

Cough Sucker Punch OHKOs when at +2 which is why Bisharp is such a bliddy threat cough
Seeing as you have four flying types why don't you just make this a mono flying team?
That or really fix that synergy :p
And spinner/Defogger.
And Zulu..... k.

- Greninja outspeeds Tornadus
- You switch against Latios, and watch in horror as it then presses the move that destroys the pokemon you switched into
- Aegislash has fun tanking Heat Wave and raping you since your bulk is so horrible
- Tell me more about how Landorus and Thundurus want to take a Rotom-W's Hydro Pump to the face
- Bisharp has fun sucker punching your whole team to death since that's priority

with you're defog argument, be careful of Defiant. Bisharp in particular will slaughter you, and obviously Lando's Intimidate won't help at all. Make sure to take out Bisharp before it gets a boost. But still, tanks for the Tornadus :D!